rust/tests/ui/dyn-star/upcast.rs
2023-01-11 09:32:08 +00:00

33 lines
407 B
Rust

// known-bug: #104800
#![feature(dyn_star, trait_upcasting)]
trait Foo: Bar {
fn hello(&self);
}
trait Bar {
fn world(&self);
}
struct W(usize);
impl Foo for W {
fn hello(&self) {
println!("hello!");
}
}
impl Bar for W {
fn world(&self) {
println!("world!");
}
}
fn main() {
let w: dyn* Foo = W(0);
w.hello();
let w: dyn* Bar = w;
w.world();
}